20147142 has 16 divisors (see below), whose sum is σ = 42664752. Its totient is φ = 6320640.

The previous prime is 20147131. The next prime is 20147147. The reversal of 20147142 is 24174102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98659 + ... + 98862.

It is an arithmetic number, because the mean of its divisors is an integer number (2666547).

Almost surely, 2^20147142 is an apocalyptic number.

20147142 is an abundant number, since it is smaller than the sum of its proper divisors (22517610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20147142 is a wasteful number, since it uses less digits than its factorization.

20147142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197543.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 20147142 is about 4488.5567836444. The cubic root of 20147142 is about 272.1058105491.

The spelling of 20147142 in words is "twenty million, one hundred forty-seven thousand, one hundred forty-two".